\(\Leftrightarrow\sqrt{4x-4}=\sqrt{2x+3}\)
=>4x-4=2x+3
=>2x=7
=>x=7/2
\(\Leftrightarrow\sqrt{4x-4}=\sqrt{2x+3}\)
=>4x-4=2x+3
=>2x=7
=>x=7/2
Giải các phương trình sau:
a) \(\sqrt{25x^2-9}-2\sqrt{5x+3}=0\)
b) \(\dfrac{\sqrt{x-3}}{\sqrt{2x+1}}=2\)
c) \(\sqrt{x^2-2x+1}+\sqrt{x^2-4x+4}=3\)
Giải các phương trình sau:
a) \(x\sqrt{x-1}+\left(2x+1\right)\sqrt{x+2}+x^3-4x^2+x-6=0\)
b) \(\left(2x+3\right)\sqrt{2x-1}+x\sqrt{x+3}+x^2-5x-3=0\)
c) \(x\sqrt{2x+3}+\left(x+1\right)\sqrt{4x-1}+2\left(x^2-x-1\right)=0\)
giải phương trình
a) \(\frac{\sqrt{x^3+1}}{x+3}+\sqrt{x+1}=\sqrt{x^2-1+1}+\sqrt{x+3}\)
b) \(\sqrt[3]{2x+1}+\sqrt[3]{2x+2}+\sqrt[3]{2x+3}=0\)
Giải phương trình
a,\(\sqrt{x^2+x-20}=\sqrt{x-4}\)
b,\(\sqrt{x+1}+\sqrt{2-x}=\sqrt{6}\)
c,\(\sqrt{x+2\sqrt{x-1}=2}\)
d,\(\sqrt{2x-2+2\sqrt{2x-3}+}\sqrt{2x+13+8\sqrt{2x-3}=}5\)
e, \(\sqrt{x^2-1}-x^2+1=0\)
f,\(\sqrt{x^2-9}+\sqrt{x^2-6x+9}=0\)
g,\(\sqrt{x^2-2x+1}+\sqrt{x^2-4x+4}=3\)
\(6x^2+2x+\sqrt[3]{3x^2+x+4}-10=0\)
\(x+1+\sqrt{x^24x+1}=3\sqrt{x}\)
\(x^2+2x\sqrt{x^2+4x+1}=3\sqrt{x}\)
\(\sqrt{x+8}+\dfrac{9x}{\sqrt{x+8}}-6\sqrt{x}=0\)
Tìm x
\(a.\sqrt{2+\sqrt{3+\sqrt{x}}=3}\)
\(b.\sqrt{x^2-4}+\sqrt{x+2}=0\)
\(c.\sqrt{x^2-5x+6}+\sqrt{x+1}=\sqrt{x-2}+\sqrt{x^2-2x-3}\)
a)\(\sqrt{x^2+2x+10}+x^2+2x+8=0\)
b)\(15x-2x^2-5=\sqrt{2x^2-15x+11}\)
c)\(\sqrt{9x^2+45}+\sqrt{16x^2+80}+3\sqrt{\frac{x^2+5}{16}}-\frac{1}{4}\sqrt{\frac{25x^2+15}{9}}=9\)
d)\(3x^2+21x+18+2\sqrt{x^2+7x+7}=2\)
e)\(\sqrt{x^2+3x+2}-2\sqrt{2x^2+6x+2}=-\sqrt{2}\)
f)\(\sqrt{x-1}+\sqrt{x+3}-\sqrt{x^2+2x-3}-1=0\)
Giải phương trình :
a, \(\sqrt{x+1}=x-1\)
b, \(x-\sqrt{2x+3}=0\)
c, \(\sqrt{x-2}-3\sqrt{\left(x-2\right)\left(x+2\right)}=0\)
d, \(\sqrt{\sqrt{3}-x}=x\sqrt{\sqrt{3}+x}\)
e, \(2\sqrt{x+3}=9x^2-x-4\)
f, \(\sqrt{x+1}-\sqrt{x-7}=\sqrt{12-x}\)
g, \(\sqrt{2x+5}-\sqrt{3x-5}=2\)
h, \(\sqrt{x}-\sqrt{x-1}-\sqrt{x-4}+\sqrt{x+9}=0\)
i, \(x^2+2x-\sqrt{x^2+2x+1}-5=0\)
k, \(\sqrt{x+8-6\sqrt{x+1}}=4\)
l, \(\sqrt{x^2-8x+16}+\sqrt{x^2-10x+25}=9\)
Làm được phần nào thì giúp mình nha đang cần gấp !!!
bài 1: rút gọn
A= \(\left(\dfrac{\sqrt{x}-1}{3\sqrt{x}1}-\dfrac{1}{3\sqrt{x}+1}+\dfrac{8\sqrt{x}}{9x-1}\right):\left(1-\dfrac{3\sqrt{x}-2}{3\sqrt{x}+1}\right)\) X>=0; x#0
B= \(\left(\dfrac{\sqrt{x}-2}{x-1}-\dfrac{\sqrt{x}+2}{x+2\sqrt{x}+1}\right):\left(\dfrac{2}{x^2-2x+1}\right)\) x>=0; x\(\ne\)1
bài 2:
\(\dfrac{1}{2x-3\sqrt{x}+2}\) x>=0
Tìm GTNN của A
Giải phương trình:
1, \(x^2\sqrt{x}+\left(x-5\right)^2\sqrt{5-x}=11\left(\sqrt{x}+\sqrt{5-x}\right)\)
2, \(2x+1+x\sqrt{x^2+2}+\left(x+1\right)\sqrt{x^2+2x+3}=0\)
3, \(\sqrt{x+2-3\sqrt{2x-5}}+\sqrt{x-2+\sqrt{2x-5}}=2\sqrt{2}\)
4, \(\sqrt{x^2-\dfrac{1}{4x}}+\sqrt{x-\dfrac{1}{4x}}=x\)
5, \(\sqrt{5x^2+14x+9}-\sqrt{x^2-1-20}=5\sqrt{x+1}\)